I'm a startup lawyer and have dealt with many employment contract issues in my practice, although mostly when I was in-house; however, that may not always be the case.
You want a good local employment law attorney who has litigated employment contracts.
Although they are based in LA, I have used a few good people who focus on employment law (they can easily review your agreement with you by phone after you send it by email or fax):
2049 Century Park East
Los Angeles, CA 90067
Main: (310) 553-0308
Yadgar, Minofar, & Soleymani
1801 Avenue of the Stars, Suite 1035, Los Angeles, CA 90067